* {
    margin: 0;
    padding: 0;
}

.w {
    width: 1200px;
    margin: auto;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
}

.header {
    height: 72px;
    margin: 10px auto;
}

.logo {
    float: left;
    width: 394px;
    height: 72px;
    padding-top: 10px;
}

.nav {
    float: left;
    position: relative;
    margin-left: 20px;
}

.nav img {
    position: absolute;
    width: 30px;
    height: 30px;
    top: 25px;
    left: 500px;
}

.nav ul li {
    float: left;
    margin: 0 15px;
}

.nav ul li a {
    display: block;
    height: 72px;
    line-height: 72px;
    padding: 0 10px;
    color: black;
}

.nav ul li a:hover {
    border-bottom: 2px solid blue;
}

.user {
    float: right;
    height: 72px;
}

.user a {
    display: inline-block;
    text-align: center;
    width: 100px;
    height: 37px;
    line-height: 37px;
    margin-top: 20px;
    border: 1px solid #496fff;
    color: #496fff;
    background-color: white;
    border-radius: 35px;
}

.user a:hover {
    background-color: #496fff;
    color: white;
}

.banner {
    height: 400px;
    background: url(./images/Background.png) no-repeat top center;
}

.banner_box {
    height: 300px;
    text-align: center;
}

.banner_box img {
    padding-top: 50px;
}

.banner_box h2 {
    line-height: 75px;
    color: white;
}

.banner_box h1 {
    width: 786px;
    height: 65px;
    line-height: 65px;
    margin-left: 200px;
    font-size: 30px;
    color: #396fff;
    border: 1px solid transparent;
    border-radius: 35px;
    background-color: #fff;
}

.banner_bottom {
    text-align: center;
    width: 200px;
    height: 60px;
    line-height: 60px;
    margin-left: 500px;
    border: 1px solid transparent;
    background-color: #ff1839;
    border-radius: 35px;
}

.banner_bottom a {
    color: white;
    font-size: 25px;
}

.container {
    height: 350px;
}

.container_title {
    height: 40px;
    margin-left: 500px;
    padding-top: 20px;
}

.container_title img {
    float: left;
    vertical-align: middle;
    width: 40px;
    height: 40px;
}

.container_title p {
    float: left;
    height: 40px;
    line-height: 20px;
    color: #181677;
    font-size: 25px;
    font-weight: bolder;
}

.container_content {
    background-color: white;
    padding: 30px 0px;
}

.container_box {
    float: left;
    width: 25%;
    text-align: center;
}

.container_box h2,
p {
    color: #181677;
    margin: 10px 0px 20px;
}

.feature {
    height: 950px;
    background-color: #f4f7ff;
}

.feature_title {
    height: 40px;
    margin-left: 500px;
    padding-top: 20px;
}

.feature_title img {
    float: left;
    vertical-align: middle;
    width: 40px;
    height: 40px;
}

.feature_title p {
    float: left;
    height: 40px;
    line-height: 20px;
    color: #181677;
    font-size: 25px;
    font-weight: bolder;
}

.feature_content {
    position: relative;
    padding-top: 30px;
    padding-left: 100px;
}

.feature_box {
    float: flex;
    width: 1063px;
    height: 227.8px;
    margin-top: 20px;
}

.feature_box img {
    float: left;
    width: 335px;
    height: 227.8px;
}

.feature_infobox {
    float: left;
    width: 610px;
    height: 195.8px;
    background-color: white;
    border-top-right-radius: 35px;
    border-bottom-right-radius: 35px;
    padding-top: 30px;
    padding-left: 30px;
}

.feature_infobox .one {
    position: absolute;
    text-align: center;
    width: 135px;
    height: 55px;
    line-height: 55px;
    top: 180px;
    left: 850px;
    font-size: 18px;
    border: 1px solid transparent;
    background-color: #ff1839;
    border-radius: 35px;
    color: white;
}

.feature_infobox .two {
    position: absolute;
    text-align: center;
    width: 135px;
    height: 55px;
    line-height: 55px;
    top: 430px;
    left: 850px;
    font-size: 18px;
    border: 1px solid transparent;
    background-color: #ff1839;
    border-radius: 35px;
    color: white;
}

.feature_infobox .three {
    position: absolute;
    text-align: center;
    width: 135px;
    height: 55px;
    line-height: 55px;
    top: 680px;
    left: 850px;
    font-size: 18px;
    border: 1px solid transparent;
    background-color: #ff1839;
    border-radius: 35px;
    color: white;
}

.bottom {
    height: 227px;
    background-color: #272c36;
}

.bottom_content img {
    float: right;
    width: 150px;
    height: 150px;
    padding-top: 20px;
}

.infobox {
    float: left;
    width: 458px;
    height: 50px;
    padding-top: 20px;
}

.infobox p {
    color: white;
    font-size: 18px;
}


/* feedback */

.feedback {
    height: 1000px;
    background-color: #f4f7ff;
}

.feedback_title {
    height: 40px;
    margin-left: 500px;
    padding-top: 20px;
}

.feedback_title img {
    float: left;
    vertical-align: middle;
    width: 40px;
    height: 40px;
}

.feedback_title p {
    float: left;
    height: 40px;
    line-height: 20px;
    color: #181677;
    font-size: 25px;
    font-weight: bolder;
}

.feedback_content {
    position: relative;
    padding-top: 30px;
    padding-left: 100px;
}

.feedback_box {
    float: flex;
    width: 1063px;
    height: 227.8px;
    margin-top: 20px;
}

.feedback_box img {
    float: left;
    border-radius: 20px;
    margin-top: 30px;
}

.feedback_infobox {
    float: left;
    width: 650px;
    height: 205.8px;
    background-color: white;
    border-radius: 35px;
    padding-top: 20px;
    padding-left: 30px;
    margin-left: 30px;
}

.feedback_infobox p {
    line-height: 30px;
}

.feedback_infobox h2 {
    color: gray;
}

.feedback_infobox .one {
    position: absolute;
    text-align: center;
    width: 135px;
    height: 55px;
    line-height: 55px;
    top: 200px;
    left: 880px;
    font-size: 18px;
    border: 1px solid #496fff;
    color: #496fff;
    background-color: white;
    border-radius: 35px;
}

.feedback_infobox .one:hover {
    background-color: #496fff;
    color: white;
}

.feedback_infobox .two {
    position: absolute;
    text-align: center;
    width: 135px;
    height: 55px;
    line-height: 55px;
    top: 450px;
    left: 880px;
    font-size: 18px;
    border: 1px solid #496fff;
    color: #496fff;
    background-color: white;
    border-radius: 35px;
}

.feedback_infobox .two:hover {
    background-color: #496fff;
    color: white;
}

.feedback_infobox .three {
    position: absolute;
    text-align: center;
    width: 135px;
    height: 55px;
    line-height: 55px;
    top: 700px;
    left: 880px;
    font-size: 18px;
    border: 1px solid #496fff;
    color: #496fff;
    background-color: white;
    border-radius: 35px;
}

.feedback_infobox .three:hover {
    background-color: #496fff;
    color: white;
}

.teach {
    background-color: #496fff;
    height: 500px;
}

.order_down {
    display: flex;
    padding-top: 20px;
}

.order_body {
    width: 33.3333%;
    text-align: center;
}

.order_left {
    position: relative;
    width: 300px;
    height: 400px;
    background-color: white;
    margin: 0 auto;
    margin-top: 35px;
    border-radius: 30px;
}

.order_left_up {
    color: white;
    height: 85px;
    border-radius: 30px;
}

.order_left_up img {
    position: absolute;
    top: 20px;
    left: 110px;
    border-radius: 50px;
}

.order_left>h2 {
    margin-top: 35px;
}

.order_left>p {
    font-size: 14px;
    margin-top: 15px;
    line-height: 30px;
}

.order_left>h4 {
    margin-top: 15px;
}

.order_left>span {
    display: block;
    margin: 0 auto;
    line-height: 40px;
    width: 200px;
    height: 40px;
    border: 1px solid #ef4f19;
    border-radius: 10px;
    color: #ef4f19;
    margin-top: 20px;
    cursor: pointer;
}

.order_center {
    position: relative;
    background-color: white;
    margin: 0 auto;
    height: 435px;
    width: 300px;
    border-radius: 30px;
}

.order_center_up {
    color: white;
    border: 1px solid white;
    height: 85px;
    border-radius: 30px;
}

.order_center_up img {
    position: absolute;
    top: 20px;
    left: 110px;
    border-radius: 50px;
}

.order_center>h4 {
    margin-top: 15px;
}

.order_center>h2 {
    margin-top: 35px;
}

.order_center>p {
    font-size: 14px;
    margin-top: 15px;
    line-height: 30px;
}

.order_center>span {
    display: block;
    margin: 0 auto;
    line-height: 40px;
    width: 200px;
    height: 40px;
    border: 1px solid #ef4f19;
    border-radius: 10px;
    color: white;
    margin-top: 55px;
    background-color: #ef4f19;
    cursor: pointer;
}